HEC Research Papers Series,
HEC Paris

Abstract: This paper develops a model in which traders receive a stream of private signals, and differ in their information processing speed. In equilibrium, the fast traders (FTs) quickly reveal a large fraction of their information, and generate most of the volume, volatility and profits in the market. If a FT is averse to holding inventory, his optimal strategy changes considerably as his aversion crosses a threshold. He no longer takes long-term bets on the asset value, gets most of his profits in cash, and generates a "hot potato" effect: after trading on information, the FT quickly unloads part of his inventory to slower traders. The results match evidence about high frequency traders.

Keywords: Trading volume; inventory; volatility; high frequency trading; price impact; mean reversion

62 pages, April 24, 2016

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